2 named cultivars

perennial

Soapwort

Q: What zones can Soapwort grow in?

Soapwort is hardy in USDA Zones 4–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Q: Is Soapwort deer resistant?

Yes — Soapwort is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

Q: When does Soapwort bloom?

Soapwort typically blooms in summer to fall through late summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Q: Does Soapwort need full sun?

Soapwort does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.

Q: Is Soapwort drought tolerant?

Yes — once established (usually after the first full season), Soapwort handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.

Saponaria officinalis

$11.99

The Story

Plant Bio

Saponaria officinalis, soapwort or bouncing bet, is an upright rhizomatous perennial from Europe and the Caucasus, one to two and a half feet high with smooth reddish-tinged stems. Broadly lance-shaped ribbed leaves sit in pairs, and clusters of pale pink or white tubular flowers open through summer, scented most strongly in the evening.

Crush the leaves in water and they lather — the saponins that give the plant its name made it a soap for centuries, and conservators still use it to wash fragile antique textiles. Those same saponins are highly poisonous to fish, so never plant it where runoff reaches a pond. It also runs strongly at the root and will colonise a border if left unchecked.

Uses & Benefits:

Clusters of soft pink flowers through summer, scented in the evening, on tough upright stems.

The traditional plant soap, still used to clean delicate historic textiles.

Night-flying moths, butterflies and hummingbirds work the evening-scented flowers.

Essentials

At a Glance

Plant Type

Perennial

Height

15 inches

Width

15 inches

Light

Full Sun, Partial Sun

Zones

4, 5, 6, 7, 8, 9

Water

Low

Humidity

Moderate

Lifespan

Perennial

Native To

Europe to the Caucasus

Toxicity

Toxic if eaten; poisonous to fish

Marketplace

Where to Buy

American Meadows

<1 Gal PotBarerootTrays

In Stock$11.99

Shipping costs Year-round shipping Free shipping

Planting

How to Grow

Plant in full sun in any well-drained soil.
Keep it away from ponds and water features.
Give it room, or confine the roots.
Cut it back after flowering to limit seeding.
Divide or reduce the clump every few years.
Expect it to reappear from root fragments.

Pro Tip

Crushed leaves lather in warm water — the traditional soap, and still used by conservators on antique fabric.

Keep It Thriving

Care Guide

Do

Give it full sun and poor soil ☀️
Contain the running roots 🚧
Cut it back after flowering ✂️
Enjoy the evening scent 🌙

Don't

Plant it near a pond or stream ❌
Let it seed through a small border ❌
Eat any part of it ❌

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cut Back
Reduce

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Naturalised meadow and roadside plantingCottage garden where it has room to runDry banks and rough ground

Companion Plants

Yarrow Oxeye Daisy Black-Eyed Susan Catmint Feverfew

Multiply

Propagation Methods

Good to Know

Common Questions

Soapwort questions

What zones can Soapwort grow in?

Soapwort is hardy in USDA Zones 4–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Soapwort deer resistant?

Yes — Soapwort is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

When does Soapwort bloom?

Soapwort typically blooms in summer to fall through late summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Soapwort need full sun?

Soapwort does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.

Is Soapwort drought tolerant?

Yes — once established (usually after the first full season), Soapwort handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.